Protection against radiation interferences
Comparative measurement
on reference housings
The best attenuation values are
shown the shielded cable without
connectors. Two connector hoods the
same type were connected each other
in coupling test specimens.
The cable shield connection the refer-
ence cable was carried out accordance
with the manufacturer’s specifications. All hoods
were equipped with identical connectors.
An absorber clamp meter then used
to measure the power output the test
specimens.
Looking the measurement results
of the full-metal housings, the advan-
tages the EMI/RFI shielding Inotec
housing design combination with
the Inotec crimp flange compared to
the measured benchmark housing
become apparent.117
Inotec regularly tests the shielding atten-
uation according DIN IEC 62153-4-5
on reference hoods. The comparative meas-
urements the connector couplings
clearly show that housings made of
solid metal generally achieve higher
shielding quality compared plastic,
whereby metal-coated plastic hous-
ings have lower attenuation than
plastic housings with metal inserts. Due the almost flush
closure with the mating connector
housing the test setup front
panel practical use, the dissipation
to the environment can significant-
ly reduced again.
The measured value the dissipation of
the test specimen the environment
via the absorber measuring clamp. The shielding attenuation
curves thus represent the difference be-
tween the dissipation relation the
values the unshielded cable.
Protection against radiation interferences
. The diagram the
following page shows the shielding atten-
uation values different hood types in
comparison. The
reference base set the output
level unshielded reference cable. addition, you can
clearly see the effect deep-drawn
hood blankets the Inotec MSX and
MSBS series
